Stop assembly



FIG. 1 is a front, left, top, isometric perspective view of a stop assembly in accordance with my design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a cross-section of the stop assembly shown in the direction of line 8-8 of FIG. 6.

The broken lines illustrate portions of the environment or stop assembly which form no part of the claimed design. 

CLAIM The ornamental design for a stop assembly, as shown and described. 